CN219843718U - Labyrinth sound box - Google Patents

Abstract

The utility model discloses a labyrinth sound box, wherein a spiral sound channel and a supporting structure for connecting the outer wall of the sound channel and the inner wall of the box body are arranged in the box body of the labyrinth sound box; the support structure is in a crystal microstructure shape formed by a plurality of connecting rods and a plurality of connecting balls, and each connecting ball is connected with a plurality of connecting rods in a dispersing way; and gaps are formed between any two adjacent connecting balls and between any two connecting rods connected with each other, and the gaps are filled with a solidification material. The spiral sound channel is smooth and smooth, and the sound quality effect is good; the supporting structure ensures that the box body structure is reliable, the strength is high, the gap on the supporting structure is larger, the solidification material can smoothly flow downwards to be filled, the box body structure after filling and solidification is ensured to be uniform, the box body structure is concise, the box body space is fully utilized through the 3D printing technology, the length of a sound tube is accurately controlled, the sound quality is easier to meet the design requirement than that of a wooden labyrinth loudspeaker box, and the processing difficulty and the manufacturing cost are reduced.

Description

Labyrinth sound box

Technical Field

The utility model relates to the technical field of sound boxes, in particular to a labyrinth sound box.

Background

The sound box is an important component of the sound system, and can convert the electric signal amplified by the power amplifier into sound and transmit the sound to ears of a person. The sound box is generally referred to as a box body with a speaker unit, and is classified into a closed type and an open type according to a structure of the sound box. The closed sound box has the advantages that the box body is provided with a round hole for installing a loudspeaker, other parts are closed, the closed sound box is the one with the simplest structure and the easiest manufacturing in the design of the sound box, and the disadvantage is that the low-frequency component of the sound box is insufficient; the open type sound box is a phase inversion sound box, and a phase inversion hole or a phase inversion tube is added on the box board of the sound box.

The principle of the phase inversion type sound box can be expressed as follows: if the size and position of the phase inversion hole are designed reasonably, the sound wave emitted from the back of the original loudspeaker can be overlapped with the sound wave emitted from the front of the loudspeaker through phase inversion Kong Daoxiang within a certain frequency band range, so that the low-frequency lower limit is expanded, and the radiation effect of the low-frequency sound wave is enhanced. In general, the open type sound box can be improved by 3dB at a low frequency band compared with a closed type sound box with the same volume, and the open type sound box can bear higher power and has smaller distortion because the displacement of the loudspeaker diaphragm at the resonance frequency of the open type sound box is small. However, since the open type speaker is very sensitive to the internal structure of the case, it is difficult to design the same.

The labyrinth sound box is a unique design of an opening sound box, which is also called a labyrinth sound box or a transmission line sound box. The loudspeaker box is characterized in that a folded reflection pipeline with a rectangular section is manufactured behind a cone of the loudspeaker and is coupled with surrounding media, and the sectional area of the sound reproduction pipeline is generally equal to the effective area of a loudspeaker diaphragm. The labyrinth box is actually that sound waves on the back surface of a loudspeaker are reflected out through a long pipeline, and the length of a sound reproducing pipeline is the design focus of the labyrinth box. When the loudspeaker unit works, the sound wave radiated by the labyrinth sound box has opposite phase to that of the sound wave in front of the loudspeaker, and a sound playing pipeline in the labyrinth has an inhibiting effect. When the phase of the radiated sound wave is consistent with that of the sound wave in front of the loudspeaker, the sound reproduction pipeline of the labyrinth sound box plays a role in lifting, which is a main starting point of the design of the sound reproduction pipeline of the labyrinth sound box.

The existing labyrinth sound box basically adopts lighter materials such as wooden plates or multi-layer plywood, and the like, is connected by mortise and tenon joint and bonding technology after being cut, has higher sealing requirements on the periphery of a sound channel in the sound box, has good box body integrity, cannot be bonded poorly and cannot leak air.

The design and manufacture key points of the labyrinth sound box at least comprise the following points:

1. the internal sound channel needs to be ensured to strictly meet the design length requirement;

2. the section of the sound channel in the control box body is larger than or equal to the section of the loudspeaker vibrating basin, so that sound transmission is ensured;

3. the sound absorbing material is laid inside, so that standing wave noise is not generated;

4. the box body needs to have weight, and the box wall needs to have thickness, so that the box body is ensured not to generate resonance or reduce resonance as far as possible.

Besides the above points, reasonable timber, high quality speaker, high quality frequency divider, high quality element, etc. are also needed to ensure the length of sound channel, enhance bass, eliminate standing wave and reduce box resonance.

The Chinese patent document CN202021222061.X discloses a labyrinth sound box, which comprises a loudspeaker arranged at the front part of a sound box body and a snake-shaped sound channel arranged in the sound box body, wherein the sound box body forms a sound cavity, the sound cavity is positioned at the back of the loudspeaker, one end of the snake-shaped sound channel is communicated with the sound cavity, and the other end of the snake-shaped sound channel extends out of the sound box body; the serpentine sound channel comprises a first serpentine sound channel and a second serpentine sound channel which are communicated with each other, one end of the first serpentine sound channel is communicated with the sound cavity, and one end of the second serpentine sound channel is communicated with a guide opening arranged at the front part of the sound box shell; the first serpentine sound channel and the second serpentine sound channel each comprise at least one bend such that the first serpentine sound channel and the second serpentine sound channel are curved; the first serpentine sound channel extends in a reciprocating curved manner in a vertical direction and the second serpentine sound channel extends in a reciprocating curved manner in a longitudinal direction.

Although the technical scheme provided by the patent document propagates to the sound cavity through the sound wave generated at the back of the loudspeaker, the path of sound propagation can be prolonged by utilizing the snakelike sound channel, and the characteristics that the sound wave can collide with the snakelike sound channel are realized, the sound wave propagated from the other end of the snakelike sound channel is thick and full, high in separation degree and strong in presence, the problems of poor sound quality, high distortion, turbid sound, poor sealing and the like of the traditional loudspeaker box are avoided, and the following defects of the traditional labyrinth loudspeaker box are overcome:

1. the design and manufacture are complex; because wood or plywood is used, the shape of the surface of the sound channel in the box body cannot be changed during manufacturing, and only a flat surface can be manufactured; the part of the sound channel inside the labyrinth sound box is spliced by cutting plates, so that the problem that the part of the sound channel is smooth and shaped, but cannot be integrally molded, and the internal continuous smooth inner surface cannot be generated is solved, the defect can generate standing waves, so that sound mixing and bass tailing are caused, the standing waves are eliminated by sticking sound absorbing materials, the inner surface is complex, the sound is not easy to eliminate well, and the tone quality is improved to a limited extent;

2. the wooden box body is adopted, the box body is light in weight, the box wall is thin, resonance of the box body can be bad, sound quality is affected, and if thick plates are adopted, the size is larger;

3. the length of the sound channel in the wooden labyrinth sound box is not easy to control accurately;

4. the combined face is made of wood materials in a mortise-tenon bonding mode, has the problem of inconsistent structural strength, and is easy to generate hidden trouble of structural damage in the use process caused by resonance of the box body;

5. the box body bonding technology may generate poor internal tightness, so that sound leakage is caused, and the tone quality effect is reduced;

6. the wooden box body is adopted, the plate needs to be accurately cut, the manufacturing process is complex, and the production and manufacturing time is long;

7. the wood is adopted as the box body, a great deal of manual work is needed in the manufacturing process, and the production cost is high.

Therefore, the existing labyrinth loudspeaker box has a plurality of defects, including but not limited to manufacturing difficulty, structural design and sound quality effect. Therefore, a new technical solution is needed to solve the problems existing in the prior art.

Disclosure of Invention

The utility model provides a labyrinth loudspeaker box, which is used for solving the problems of poor sound quality effect and complex manufacture of the existing labyrinth loudspeaker box.

In order to achieve the above object, the present utility model provides the following technical solutions:

the utility model provides a labyrinth sound box, which is manufactured by 3D printing and comprises a spiral sound channel, wherein the outer wall of the sound channel is connected with a supporting structure, and one end of the sound channel forms a mounting position for mounting a loudspeaker;

the support structure is in a crystal microstructure shape formed by a plurality of connecting rods and a plurality of connecting balls, and each connecting ball is connected with a plurality of connecting rods in a dispersing way; a gap is formed between any two adjacent connecting balls and between any two connecting rods connected with each other, and the gap is filled with a solidification material; the support structure is wrapped by the solidifying material and solidifies to form the box body of the labyrinth sound box.

In the above technical scheme, the two ends of the sound channel respectively penetrate through the outer wall of the box body and are communicated with the outside.

Further, a standing wave guiding structure and a standing wave eliminating structure are arranged on the inner wall of the sound channel, the standing wave guiding structure is used for guiding the sound wave reflected on the inner wall of the sound channel to the standing wave eliminating structure, and the standing wave eliminating structure is used for weakening and eliminating the standing wave guided into the standing wave eliminating structure.

Further, the standing wave eliminating structure comprises a plurality of inclined grooves formed on the inner wall of the sound channel, wherein the inclined grooves are grooves recessed from the surface of the inner wall of the sound channel; the chute is an annular groove which is provided with a circle along the radial direction of the sound channel.

Further, the standing wave guiding structure comprises a plurality of fins arranged on the inner wall of the sound channel, the fins are obliquely arranged, and the fins are a circle of convex rings protruding upwards from the surface of the inner wall of the sound channel.

Further, the groove cavity of the chute forms a silencing area, the cross section of the groove cavity is triangular, and the vertex angle of the triangle, which is positioned in the pipe wall of the sound channel, is inclined towards the direction of the sound source.

Further, the groove edge of each chute is provided with a fin corresponding to the chute, the inclination direction of the fin is opposite to the sound propagation direction, the surface of the fin facing the sound source is opposite to the groove cavity of the chute corresponding to the fin, and the sound wave reflected on the pipe wall is reflected to the groove cavity through the fin to realize standing wave attenuation and elimination.

Further, the supporting structure is connected with the inner wall of the box body through the connecting rod or the connecting ball, and the supporting structure is connected with the outer wall of the sound channel through the connecting rod or the connecting ball.

Further, a plurality of connecting balls are dispersed in the space between the inner wall of the box body and the outer wall of the sound channel, and two adjacent connecting balls are connected through a connecting rod; the connecting ball and the connecting rod are solidified with the solidification material into a whole.

Further, the box body is a plastic box body, a rubber box body, a nylon box body, a metal box body, a ceramic box body or a cement box body.

Further, the solidification material is epoxy resin or cement and other materials.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model provides a labyrinth sound box, wherein a spiral sound channel and a supporting structure for connecting the outer wall of the sound channel and the inner wall of the box body are arranged in the box body of the labyrinth sound box; the support structure is in a crystal microstructure shape formed by a plurality of connecting rods and a plurality of connecting balls, and each connecting ball is connected with a plurality of connecting rods in a dispersing way; and gaps are formed between any two adjacent connecting balls and between any two connecting rods connected with each other, and the gaps are filled with a solidification material. The labyrinth sound box provided by the utility model is prepared by 3D printing, and a printed spiral sound channel is smooth and has good sound quality effect; the supporting structure ensures that the box body structure is reliable, the strength is high, the gap on the supporting structure is larger, the solidification material can smoothly flow downwards to be filled, the box body structure after filling and solidification is ensured to be uniform, the box body structure is concise, and the processing difficulty and the manufacturing cost are reduced through the 3D printing technology.

2. The inner wall of the sound channel is provided with the standing wave guiding structure and the standing wave eliminating structure, so that standing waves can be eliminated, and the sound quality is improved.

3. The labyrinth sound box provided by the utility model is manufactured by adopting the 3D printer, the sound pipeline inside the labyrinth sound box is printed according to the design shape, the manufacturing material of the sound pipeline can be adjusted according to the requirement, the sound pipeline can be made of engineering plastics, nylon, clay, metal and other materials, and various size parameters of the labyrinth sound box can be adjusted, such as the pipe wall thickness of a sound channel, the size of a supporting structure and the like.

4. The support structure of the labyrinth loudspeaker box provided by the utility model is connected with the inner wall of the box body through the connecting rod or the connecting ball, and is connected with the outer wall of the sound channel through the connecting rod or the connecting ball. And plays a role in supporting the sound pipeline and connecting the box body in the manufacturing process.

5. The labyrinth sound box provided by the utility model adopts a 3D printing technology, so that the box body space is fully utilized, and the length of the sound tube is accurately controlled; the tone quality is more easy to reach the design requirement than wooden maze audio amplifier.

6. The labyrinth sound box provided by the utility model adopts the 3D printing technology, so that the sound pipeline with smooth inner wall can be printed and manufactured according to the requirement, standing waves can be eliminated, and the sound propagation effect is enhanced; the tone quality is improved than wooden maze audio amplifier.

7. The support structure of the labyrinth loudspeaker box provided by the utility model can strengthen the stability of the sound tube in the structure, and the sound tube and the support structure are integrally fixed by pouring the solidification material (box body material), so that the labyrinth loudspeaker box is stronger than a wooden labyrinth loudspeaker box, heavier in weight, and less in possibility of box body resonance due to a non-uniform thin-wall structure of the box wall.

8. The manufacturing method of the labyrinth loudspeaker box provided by the utility model adopts the 3D printer to carry out large-scale manufacturing, so that the production personnel are few, the efficiency is high, and the period is short; the manual process is reduced in the manufacturing process, and the manufacturing cost is reduced compared with that of a wooden labyrinth sound box.

9. Because the labyrinth sound box is produced by adopting the 3D printer, the product customization is easy to carry out by adjusting various data, and compared with a wooden labyrinth sound box, a single product can also produce a high-quality product by the same process, and the manufacturing cost is low.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. It should be understood that the specific shape and configuration shown in the drawings are not generally considered limiting conditions in carrying out the utility model; for example, those skilled in the art will be able to make routine adjustments or further optimizations for the addition/subtraction/attribution division, specific shapes, positional relationships, connection modes, dimensional proportion relationships, and the like of certain units (components) based on the technical concepts and the exemplary drawings disclosed in the present utility model.

FIG. 1 is a schematic diagram of the basic structure of a labyrinth loudspeaker;

FIG. 2 is a schematic diagram of the position of a sound channel in a labyrinth box in the box according to an embodiment of the present utility model, where the support structure is not shown;

FIG. 3 is a schematic perspective view of a support structure according to an embodiment of the present utility model;

FIG. 4 is a schematic perspective view of a supporting structure according to another embodiment of the present utility model;

FIG. 5 is a schematic diagram of the overall structure of a labyrinth speaker according to the present utility model in an embodiment;

FIG. 6 is a schematic cross-sectional view of a section of sound channel in a labyrinth box according to an embodiment of the present utility model, mainly illustrating a chute and fins disposed on a tube wall;

fig. 7 is a schematic structural diagram of a labyrinth box with a honeycomb-shaped support structure according to the first embodiment, in order to show the positional relationship between the honeycomb-shaped support structure and the sound tube, a part of the support structure is shown, and it can be seen from the figure that the boundary between the honeycomb-shaped support structure and the wall of the sound tube coincides, and the solidified material is blocked by the wall of the sound tube and cannot flow down.

Reference numerals illustrate:

01. a case; 02. a labyrinth sound channel; 03. a speaker;

1. a case; 2. a sound channel; 21. a chute; 22. fins; 3. a support structure; 31. a connecting rod; 32. a connecting ball;

A. direction of sound wave propagation.

Detailed Description

The utility model will be further described in detail by means of specific embodiments with reference to the accompanying drawings.

In the description of the present utility model: unless otherwise indicated, the meaning of "a plurality" is two or more. The terms "first," "second," "third," and the like in this disclosure are intended to distinguish between the referenced objects without a special meaning in terms of technical connotation (e.g., should not be construed as emphasis on the degree of importance or order, etc.). The expressions "comprising", "including", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

The terms such as "upper", "lower", "left", "right", "middle", etc. are generally used herein for convenience of visual understanding with reference to the drawings and are not to be construed as absolute limitations on the positional relationship of the actual product. Such changes in the relative positional relationship without departing from the technical idea of the present utility model are also considered as the scope of the present utility model.

Example 1

The utility model provides a brand-new labyrinth sound box, which not only improves the structure of a sound channel in the sound box, but also correspondingly improves the manufacturing method and the materials of the sound box, thereby reducing the manufacturing difficulty, improving the processing efficiency, reducing the production cost, improving the sealing performance of the sound box and improving the sound quality effect. In all aspects, compared with the traditional labyrinth loudspeaker box, the labyrinth loudspeaker box realizes qualitative leap.

The labyrinth sound box mainly comprises a box body, a supporting structure and a sound pipeline, and the structural principle of the three parts forming the labyrinth sound box is described in detail below with reference to the accompanying drawings.

1. Box body

Referring to fig. 1, the labyrinth loudspeaker box is a basic structure, and comprises a box body 01 and a labyrinth type sound channel 02 arranged in the box body 01, wherein the head end of the sound channel is connected with a loudspeaker 03, and the labyrinth type sound channel 02 is an S-shaped channel. The structure can be said to be the prototype of all labyrinth boxes, and with the improvement of technology and sound quality requirements, the structure of the labyrinth box nowadays is complicated, and the manufacturing difficulty is improved greatly.

The structure of the labyrinth loudspeaker box provided by the utility model is also an improvement on the basis of the basic structure. Specifically, referring to fig. 2, 3 and 5, the labyrinth sound box provided by the utility model comprises a box body 1, wherein a containing space is formed in the box body 1, a spiral sound channel 2 is arranged in the containing space, and a supporting structure 3 is used for connecting the outer wall of the sound channel 2 with the inner wall of the box body 1, and the supporting structure 3 is used for firmly and reliably connecting the sound channel with the inner wall of the box body; one end of the sound channel is used for installing a loudspeaker.

The labyrinth sound box provided by the utility model is manufactured by using a 3D printer, so that the manufacturing material is different from the traditional wood, and the box body material, the sound pipeline material and the supporting structure material can be plastic, rubber, nylon, metal, ceramic or cement. Of course, based on the 3D printing technology, the material for manufacturing the labyrinth box can be other materials suitable for 3D printing.

2. Supporting structure

The support structure of the labyrinth loudspeaker box provided by the utility model is in a three-dimensional grid shape, and for easier understanding, reference can be made to a diamond crystal structure or a cesium chloride crystal structure. The support structure is considered to be a three-dimensional grid structure similar to a crystal microstructure, consisting of a number of connecting rods and a number of connecting balls. The structure not only has stable and reliable connection, but also forms a gap, and is favorable for fully pouring the solidification material in the manufacturing process.

The setting material for filling may be epoxy resin, cement, or the like. Of course, based on 3D printing techniques, the solidified material may also be other materials suitable for 3D printing.

The crystal grid-shaped supporting structure is a preferable structural form determined by the inventor after a plurality of research experiments. For example, at the beginning of design, the inventor considered to design the supporting structure to be honeycomb-shaped, as shown in fig. 7, but the boundary between the honeycomb-shaped supporting structure and the wall of the sound tube is coincident, and then when the solidifying material is poured, the solidifying material is blocked by the wall of the sound tube and cannot flow downwards, so that the filling is incomplete, the box body structure is uneven, and the sound quality of the sound box is further affected.

Specifically, referring to fig. 3 and 4, the support structure 3 provided by the present utility model includes a plurality of connection rods 31 and a plurality of connection balls 32, and a three-dimensional grid structure similar to a crystal microstructure is formed by the connection rods 31 and the connection balls 32. Therefore, a plurality of connection rods 31 are dispersedly connected to each connection ball 32, and the plurality of connection rods 31 are arbitrarily distributed in the three-dimensional space. Such as the crystal microstructure of diamond, and voids are formed between any two adjacent connecting balls, and between any two connected connecting rods, which voids will be available for filling in the solidified material in the future.

The supporting structure provided by the utility model is similar to a crystal microstructure, so that the supporting structure is reliable in supporting, high in strength and large in gap, and can smoothly allow a solidification material to flow down for filling, so that the structure of the box body after filling solidification is uniform.

3. Sound channel

The sound channel of the labyrinth loudspeaker box provided by the utility model can eliminate standing waves and improve the sound quality. Specifically, the two ends of the sound channel of the labyrinth sound box respectively penetrate through the outer wall of the box body and are communicated with the outside, and a loudspeaker is arranged at one end of the sound channel and used as a sound source.

In order to achieve the standing wave elimination, the inner wall of the sound channel in the utility model is provided with a standing wave guiding structure and a standing wave elimination structure, wherein: the standing wave guiding structure may guide the sound wave reflected on the inner wall of the sound channel to the standing wave canceling structure, and the standing wave canceling structure may attenuate and cancel the standing wave guided therein.

Specifically, referring to fig. 6, the standing wave eliminating structure includes a plurality of inclined grooves 21 opened on the inner wall of the acoustic path 2, the inclined grooves 21 being grooves recessed from the surface of the inner wall of the acoustic path 2; the chute 21 is an annular groove provided with a circle in the radial direction of the sound passage 2. The plurality of annular inclined grooves 21 are arranged in sequence along the extending direction of the sound passage 2.

The standing wave guiding structure comprises a plurality of fins 22 arranged on the inner wall of the sound channel, wherein the fins 22 are obliquely arranged, and the fins 22 are a circle of convex rings protruding upwards from the surface of the inner wall of the sound channel 2. The inclined convex ring is provided with a circle along the radial direction of the sound channel 2, and like the chute 21, a plurality of fins 22 are arranged in sequence along the extending direction of the sound channel 2.

The above-mentioned groove cavities of the chute 21 form a sound deadening zone, and the cross-sectional shape of the groove cavities is preferably triangular, in particular an obtuse triangle, with the apex angle of the triangle in the wall of the sound channel extending obliquely in the direction of the sound source.

The groove edge of each chute 21 is provided with a fin 22 corresponding to the chute, the inclination direction of the fin 22 is opposite to the sound propagation direction, the surface of the fin 22 facing the sound source is opposite to the groove cavity of the chute 21 corresponding to the fin 22, and the sound wave reflected on the pipe wall is reflected into the groove cavity through the fin 22 to realize standing wave weakening and elimination.

Therefore, the sound channel of the labyrinth sound box provided by the utility model can weaken or even eliminate standing waves in sound transmission, and improve sound quality.

The main principle of the labyrinth sound box is that the rear sound wave of the loudspeaker cone propagates along the sound channel when vibrating, the length of the sound channel is calculated to delay the wave form before the cone for a period of time due to the characteristics of wavelength and frequency, so that the external sound is consistent with the forward vibration direction of the loudspeaker cone, the sound wave superposition is generated, the sound effect is enhanced, the length of the backward pipe determines the delay period, and the enhancement effect is also determined. The shape of the inner wall determines whether standing waves will be generated inside.

The existing labyrinth sound box adopts a wooden box body and mortise-tenon bonding technology, a silencing structure is designed in the existing labyrinth sound box, and a channel is flat; the corners are designed with circular arcs to attenuate standing waves in sound propagation. Although the existing labyrinth loudspeaker box can also achieve better sound quality effect, the manufacturing process is complex, the realization of high sealing performance is not easy, and the process cost and the manufacturing cost are high. Therefore, in order to reduce the processing difficulty of products and reduce the production cost, the utility model provides the labyrinth sound box, which is manufactured by a 3D printing technology, and the sound channel and the supporting structure of the labyrinth sound box are improved, so that the manufacturing difficulty is reduced, and the further upgrading of the sound quality is realized.

The labyrinth box actually reflects sound waves on the back surface of a loudspeaker (a horn unit) through a long sound pipeline, and the length of the sound pipeline needs to be calculated. If the length of the sound pipe is 1/2 wavelength of the radiation sound frequency, the phase will shift to 180 deg, and the sound wave released from the end opening of the sound pipe of the whistle box will be in the same phase with the sound produced in front of the loudspeaker unit. The same holds true if the length of the sound tube is set to 1/4 wavelength, and the length of the sound tube can be shortened. The length of the sound pipe of the labyrinth box is generally 1/4 wavelength of the resonance frequency of the loudspeaker, and at this time, the acoustic impedance of the sound pipe is very large, and the moving range and nonlinear distortion of the voice coil of the loudspeaker are greatly reduced.

Example two

The structure, tone quality and manufacturing method of the traditional labyrinth loudspeaker box have a plurality of defects, and at least the following problems need to be solved in the current production and manufacturing of the labyrinth loudspeaker box:

1. the section and the length of the sound channel inside the sound box are complicated to design and manufacture, and the sound channel is difficult to ensure to be consistent with a design drawing when manufactured;

2. the inner surface of the sound channel inside the sound box is not smooth and is not continuous, standing waves and noise can be generated;

3. the sound box body is made of wood, so that the weight is light, and box resonance is easy to generate;

4. the loudspeaker box is made of wood, so that the manual operation is more, the process is complex, the production period is long, the price is high, and the customized product is not easy to produce.

The utility model provides a manufacturing method of a labyrinth sound box, which is manufactured by adopting a 3D printing technology, and the labyrinth sound box manufactured by the manufacturing method overcomes the problems existing in the traditional production and manufacture of the labyrinth sound box.

The manufacturing method of the labyrinth loudspeaker box provided by the utility model specifically comprises the following steps:

s1: leading a three-dimensional model of a labyrinth sound box to be printed into a 3D printer, wherein the three-dimensional model comprises a sound channel of the labyrinth sound box and a supporting structure connected to the outer wall of the sound channel;

s2: starting a 3D printer to print out a sound channel and a supporting structure of the labyrinth loudspeaker box according to the three-dimensional model data;

s3: placing the sound channel and the support structure which are obtained by printing in the step S2 into a mould, injecting a solidification material into the mould, and allowing the solidification material to flow downwards along a gap on the support structure until the solidification material completely covers the top of the sound channel and the top of the support structure;

s4: and removing the die after the solidification of the solidification material, performing surface treatment, decoration, part installation and other works, and finally obtaining a finished product.

According to the manufacturing method provided by the utility model, the 3D printer is adopted to print out the sound pipeline in the labyrinth box according to the design shape, the manufacturing materials can be adjusted according to the requirements, the manufacturing materials can be engineering plastics, nylon, clay, metal and other various materials, and various size parameters of the labyrinth box can be adjusted, such as the pipe wall thickness of a sound channel, the size of a supporting structure and the like.

The support structure of the labyrinth loudspeaker box provided by the utility model is connected with the inner wall of the box body through the connecting rod or the connecting ball, and is connected with the outer wall of the sound channel through the connecting rod or the connecting ball. And plays a role in supporting the sound pipeline and connecting the box body in the manufacturing process.

Because the utility model adopts the 3D printing technology, the box space is fully utilized, and the length of the sound tube is accurately controlled; the tone quality is more easy to reach the design requirement than wooden maze audio amplifier.

Because the utility model adopts the 3D printing technology, the sound pipeline with smooth inner wall can be printed and manufactured according to the requirement, standing waves can be eliminated, and the sound propagation effect can be enhanced; the tone quality is improved than wooden maze audio amplifier.

The support structure of the labyrinth loudspeaker box provided by the utility model can strengthen the stability of the sound tube in the structure, and the sound tube and the support structure are integrally fixed by pouring the solidification material (box body material), so that the labyrinth loudspeaker box is stronger than a wooden labyrinth loudspeaker box, heavier in weight, and less in possibility of box body resonance due to a non-uniform thin-wall structure of the box wall.

The manufacturing method of the labyrinth loudspeaker box provided by the utility model adopts the 3D printer to carry out large-scale manufacturing, so that the production personnel are few, the efficiency is high, and the period is short; the manual process is reduced in the manufacturing process, and the manufacturing cost is reduced compared with that of a wooden labyrinth sound box.

Because the utility model adopts the 3D printer to produce, the product customization is easy to carry out by adjusting various data, and compared with a wooden labyrinth loudspeaker box, a single product can also produce high-quality products by the same process, and the manufacturing cost is low.

Any combination of the technical features of the above embodiments may be performed (as long as there is no contradiction between the combination of the technical features), and for brevity of description, all of the possible combinations of the technical features of the above embodiments are not described; these examples, which are not explicitly written, should also be considered as being within the scope of the present description.

The utility model has been described above with particularity and detail in connection with general description and specific embodiments. It should be understood that numerous conventional modifications and further innovations may be made to these specific embodiments, based on the technical concepts of the present utility model; but these conventional modifications and further innovations may also fall within the scope of the claims of the present utility model as long as they do not depart from the technical spirit of the present utility model.

Claims (7)

1. The labyrinth sound box is characterized by being manufactured by 3D printing and comprising a spiral sound channel, wherein the outer wall of the sound channel is connected with a supporting structure, and one end of the sound channel forms a mounting position for mounting a loudspeaker;

the supporting structure is in a crystal microstructure shape formed by a plurality of connecting rods and a plurality of connecting balls, and each connecting ball is connected with a plurality of connecting rods in a dispersing way; a gap is formed between any two adjacent connecting balls and between any two connecting rods connected with each other, and a solidification material is filled in the gap; the support structure is wrapped by the solidification material and solidifies to form the box body of the labyrinth sound box.

2. The labyrinth box as claimed in claim 1, wherein the two ends of the sound channel respectively penetrate through the outer wall of the box body and are communicated with the outside;

the inner wall of the sound channel is provided with a standing wave guiding structure and a standing wave eliminating structure, the standing wave guiding structure is used for guiding the sound wave reflected on the inner wall of the sound channel to the standing wave eliminating structure, and the standing wave eliminating structure is used for weakening and eliminating the standing wave guided into the standing wave eliminating structure.

3. The labyrinth box as in claim 2, wherein the standing wave elimination structure comprises a plurality of inclined grooves formed on the inner wall of the sound channel, wherein the inclined grooves are concave grooves recessed from the surface of the inner wall of the sound channel; the chute is an annular groove which is provided with a circle along the radial direction of the sound channel.

4. A labyrinth box as in claim 3 wherein the standing wave guide structure comprises a plurality of fins disposed on the inner wall of the acoustic channel, the fins being inclined, the fins being a ring of raised rings protruding upwardly from the surface of the inner wall of the acoustic channel.

5. The labyrinth box as in claim 4, wherein the chute cavity forms a sound deadening zone, the cross-sectional shape of the chute cavity being triangular, the apex angle of the triangle located in the wall of the sound channel being inclined toward the sound source;

the groove edge of each chute is provided with a fin corresponding to the chute, the inclination direction of the fin is opposite to the sound propagation direction, the surface of the fin facing the sound source is opposite to the groove cavity of the chute corresponding to the fin, and the sound wave reflected on the pipe wall is reflected to the groove cavity through the fin to realize standing wave weakening and elimination.

6. The labyrinth loudspeaker of claim 1, wherein the support structure is connected to the inner wall of the cabinet by a connecting rod or a connecting ball, and the support structure is connected to the outer wall of the sound channel by a connecting rod or a connecting ball;

a plurality of connecting balls are dispersed in the space between the inner wall of the box body and the outer wall of the sound channel, and two adjacent connecting balls are connected through a connecting rod; the connecting ball and the connecting rod are solidified with the solidification material into a whole.

7. The labyrinth box as in claim 1, wherein the box is a plastic box, a rubber box, a nylon box, a metal box, a ceramic box, or a cement box;

the solidification material is epoxy resin or cement.